DTC B2478: Reverse Light Relay Shorted To Battery: Description

When PZM receives input that transaxle is in Reverse, PZM energizes reverse light relay which will turn on back-up lights. When back-up lights have been commanded on, PZM constantly measures voltage at Brown 32-pin connector C2, terminal D14 (Dark Green wire). DTC B2478 will set when voltage is not at ground potential for at least 2 seconds. DTC B2478 will clear when voltage is greater than ground for at least one monitoring cycle.